Forced-draft pan structure



June 15 1926.

o. G. WERNER FORCED DRAFT PAN STRUCTURE Filed Sept. 16, 1925 famnuumfgg UZZZ 6. fVer/ze/f Patented June 15, 1926. z y UNITED STATES .A'EZNT FFICE.

OTTO G. TERNER, O1 NEWARK, NEVI YORK, ASSIGNOR 0F ONQEJ'IALF T0 FRANK W.

GILBERT, OE' NEWARK, NEW YQRK.

FORCED-DRAFT PAN STRUCTURE.

Application filed. September 16, 1925. Serial No. 56,727.

The present invention relates to an imthe opening 12. A cap 13 is constructed proved pan structure for supporting grates with an upwardly disposed annular flange adapted for use with a forced draft and has forming a cylinder 1e slidable over the eXtefor its principal object to generally improve rior surface of the cylinder' 9. A bar 15 upon the valve structure used with the pan. extends diametrically across the cap 13 on 60 Another 'very import-ant object of the inthe under surface thereof and is fixed thercvention is to provide an improved valve to in any suitable manner. This bar 15 structure which will remain closed under the extends beyond the edge of the cap 13 teraccumulated pressure which may occur by minating in curved extensions 16. A pair of io coal dust or other fuel caking on the grate hooks 17 depend from the bottom 11 one 65 and preventing the circulation of the forced above each extension 16. Springs 18 are draft so that said accuinulative pressure gageablel with the hooks 17 and extensions may break up said cake formed on the grate 16 for holding the cap 13 in abutment with but lwhich will open should an explosion the bottom edge of the cylinder 9. These 15 take place by the ignition of accumulative Springs 18 have sufficient tension to prevent 70 gases inthe furnace. the opening of the cap from the cylinder 9 Another important object ofthe invention under ordinary accumulative pressure with- .is to providea valve structure which is cainthe pan 5 or within the furnaceY so that pable of being easily and quickly disas- `should the grate becomec-logged so that the 20 sembled when desired for the purpose of air may not pass therethrough the pressure 75 cleaning out the pan. v may accumulate from the forced draft lVit-h the above and numerous other ob- Source to such an extent as to unclog the jects in view as will appear as the descripgrate without opening the valves. However, tion proceeds, the invention resides in cershould an explosion take place within the tain novel features of construction, and in furnace becauseof the ignition of accumu- 80 the combination and arrangement of parts lative gases, as frequently occurs, the presas will be hereinafter more fully described sure caused by such explosion will be sufand claimed. ficient to overcome the tensions of the In the drawing springs 18 and allow the cap 13 to unseat Figure 1 is a side elevation of the imsufficiently to relieve said pressure. The ac- 85 proved pan embodying the features of my cumulative pressure spoken of above may invention, unseat the cap 13 from the bottom edge of Figure 2 is a bottom plan view thereof. the cylinder 9 but nevertheless no air may Figure 3 is an enlarged detail section escape because of the close fit of the cylintaken through one of the valves. drical flange 14 in the cylinder 9. 90

Referring to the drawing in detail, it will The present embodiment of this invention be seen that 5 designates the pan or bowl has been disclosed merely by way of example adapted to support a grate such as is dissince in actual practice it attains the feaclosed clearly in my pending application tures of advantage enumerated as desirable bearing Serial Number 37,737, filed June in the statement of the invention and the 9D 17, 1925. A. pipe 6 depends centrally from above description. It will be apparent that the bottom of the pan 5 and has a reduced numerous changes in the details of constructerminal 7 over which may be received one tionimay be Aresorted to without departing end of an elbow 8 leading from a suitable from the spirit or scope of the invention as Source 0f forced draft. To each side 0f the hereinafter claimed or sacrificing any of its 100 pipe 6 there is disposed a valve structure advantages. depending from the bottom of the pan. Having thus described my invention what These valve structures are identical in for- I claim as new is mation and a detailed description of one 1- In Combination, a forced draft grate will suliice for both. Referring to one of supporting pan, an outlet formed in said the valve structures in detail it will be seen pan, a closure enclosing 'said outlet and havthat numeral 9 designates a depending` ing means permitting limited movementof cylinder having its upper end fixed to a dethey closure without uncovering the outlet, pending flange 10 formed integral with the and means normally' hldnig said closure bottom 11 of the pan 5 and disposed around closed under ordinary accumula-tive pressure 11@ within the pan and permittingsaid limited movement and also adapt-ed to allow the unseating of said closure under explosive pressure for opening the outlet.

2.111 combination7 a forced dra-ft grate supporting pan, a cylinder depending from said pan, a second cylinder telescopically sociated with the first Cylinder, a cap formed on said second cylinder, and a spring means associated with t-he cap to normally hold it closed on the lower end of the cylinder and of such a tension to prevent the cylindrical flange from being forced from the cylinder under ordinary accumulative pressure but allowing the cylindrical flange to be forced from the cylinder under explosive pressure.

3. In combination, a forced draft grate supporting pan, a cylinder depending from said pan, a cap closable over the lower end of said cylinder and provided with a cylindrical flange telescopically associated with the cylinder, and springs normally heldin'g,` said cap seated on the lower end of said cylinder and preventing the removal of the cylindrical flange from the cylinder under ordinary accumulative pressure but allowing the removal of said cylindrical flange from the cylinder under explosive pressure.

4. In combination, a forced draft grate supporting pan, a cylinder extending from the pan, a cap on the outer end of the cylinder, a cylindrical flange formed on the cap and tclescopically associated with the cylinder, a bar extending diametrically across the cap and terminating in curved extensions beyond the edge of the cap7 hooks mounted on the pan, and springs detachably engaged with said curved extensions, and of such a tension to normally hold the cap seated on the outer end of the cylinder and to prevent the removal of the cylindrical flange from the cylinder under accumula-tive pressure but allowing the removal of the cap and flange from the cylinder under explosive pressure.

5. ln combination, a forced draft grate supporting pan, a cylinder extendingl from the pan, a second cylinder telescopica-ily associated with the first cylinder, a cap on the second cylinder closable over the outer end of the first cylinder, and spring means associated with the cap to normally hold it seated on the outer end of the first cylinder and of such a tension as to prevent the removal of the second cylinder from the Iirst cylinder under ordinary accumulative pressure but allowing the removal of the second cylinder from the first cylinder under explosive pressure.

n testimony whereof I aflix my signature.

OTTO G. VERNER. 

